Sheet-stitching machine



Jaim., 2 i923., 19449 U. BISCHOF. SHEET STI-reame Mlm-uws.

Fl LED Aue- 1 i915.

Fay.,

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vez@ mi UCE y 7gg/EM Warn/@y U. BISCHOF. SHEET `Srlrcmru; MACHINE.

Fl LED Aus. l 1919. 8 SHEETS-SHEET 4 ze'A 77 A In wem/mz@ UB 5 @l2/@Z2 im 2, w23.

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v 8 SHEETS-SHEET 6 U. BISFHOF SHEET STlTcHlNG MAcHINE, FILED Aus. 1 |919 .lem 2.

i; la ma my STABLL 0F Applca'oil filed August l, 1919.

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'l nel. lime invented certain 'new and el ,.fei'le H 5 useiiul luipreveiiieul-s in olieebotitelilul lwleeliines, of which the rollowiiig'is a. specietlier slieers wilii-liieed el" 'the type eenipulsing.;v three neeles and :mi imp'er 'lll'eiv lmmer uiraiue'eil :il lie stitcliliig plu.

llie iiiimeT/l iiuieliigue oi this '1a/werf 'tien emiqirises L lireecl loeper arranged 'under Llifz sieliing plate lor pleci 0' l .e 'lilireml loop smiling from lie first i'ieeclle loop 'leriuelbjf "alle seceiicl iieefgllc. ai relurv slice which, when closed, enters oe- 'tweeii lille loe@ opened-oui by the lower 'thread leeper uli-1l lre upper looper, and by rrouul u: ,vertical exis oper "lle loep. u. lieolfell needle ler er); f

i les elf one eufl elf le* a :unl :.lrzvluf'iolr it tliroufgl`r loep opener 25 i501* this purgwse, u limit-lf ing; the leer, sumx-fiuled "L :if ufmslgi'ucliouml ferm ol" *elle iiiprovel me cliiiie 'ce alle ext-ent required 'for miller-steriliiiigg' Ihe invention.

Fig; 'l s sicle elevation ol" llie improved 40 machine.

Fig. 2 .is iroiit elevalfeu lreef 'viewed u. sul@ el :ii-row e ulusl'ule ou ll Serial No. 314,720.

be coupled to the driving pullef,7 l that is loose on the shaft 2, by means olf a clutch 3 or known, ceiieruetiou (not 'further described lier und creaclle 5 (Figs. l

.all 2 is a, drum eccentric 5 which scillaery mollen te e lever 7 by uref-.lus of au eirbifriction roller 9 mounted on pinB (Figs. 3 ancl26). The lever 7 is liriecl en shalt. 7iL wiich' is rotatably suppoilecl iii bearings 7b'of the framing'. @n 'the lever 7 is fixed a, pin l0 carrying a ro mi' lele block Ellie latter engages e driver which is fixed on a shalt 13 mountell iii 'the framing l. This shaft carries 'the lower "'rezul leeper le. The front of the eccentric lies lixefl on it a second nose l5 (Fig. which is arranged to strile and more at intervals a. roller 176 iixecl on the lever 175. The free end oi"A this lever is een- 'iiectell ley :i roel i8 'to en arm 17 on a, ber 1G which leter is mounted vertically on the framing l and carries theA shear blades US (lligsy2, 5S, fiend 2G).

U11 the shalt 2 fuere is l'urher fixed. is, cam l5) which iumerts oscillatory motion by means of L pii 2l mul :intifrcioii roller 22 io u. lever 20 {itil/l un fhe vertical slm-ift 21% mount-ell in lle framing (Fig. l). 'GB lie shell; L3 there is also u. lever 25% provided willi u.. piu 25. e. rod 26 connects this pin v pin 28 mounted en the rocl 27, so their tlii., red 27 the upper thread looper 29 fixed on ellis rofl. the noses 30 and 3l, the erm 32 liliell ou lflie 106.27, and the erm 33 loose tlie1:eoii,'c:.ii1 be moved laterally. The 'wo ii-uis 5416.33 are provided with pins Bel and with aut-irictioii rollers 36 and 37, and 'these pins' are pressed by e tension spring against @am bers l0 and @el fixed ou the shall; 39 (Figs. la 25 und 25a). Both arms und 2liare cur'vel'l at Ylle right end., as, shown' iu Fig: l., but the ejml oli -the arm lies over :unl the eucl ei the erm 33 uuler ilie horizonte-l plume of elle rod 26. Further lille erm pressed against tliey @am bur "l bv .A connected to ille The rocls 39, 27 and shalt are mounlecl en a. lever 7 ulrich is provided Willi a Stitching' plaie l5 and xerl en a shelf+ ,mountecl iu the framing. Gu this shaft is a lei'er CII 49 fitted with a pin50 carrying an antilriction roller51, and adapted to he actuated by a cam 52 iixed on the shaftA 2. Un the shalt 45 are levers 53 and 54, and also levers 56 and 57 carrying a bar 55. To the bar 55 are bolted tongues 58, 59, 60 each tor-ined with a slot. rlhe tongues engage in grooves 61 in the underside oie the stitching plate 46. Under this plate is the table saddle 62 of the framing with the two table plates 63, 64. Upon these latter plates the material to be 'stitched'is placed. On the shaft 13 is an arm 65 carrying a pin 66 and an antifriction roller 67 which rests on a cam bar 68 mounted yon the framing (Figs. 1 and 6); and is p pressed against this cani har by a tension spring that is connected to pins 66 and 69.

0n a shaft 72 (Figs. 1 'to 4) mounted in the framing, are mounted bell crank levers 73, 74, 75 carrying pins 91, 92, 93 litted with antifriction rollers 97, 98, 99 hearing against cams 82, 83, 84 mounted on shaft 2. 'lhese levers 73,74, 75are connected by rods 85, 86, 87 to the needle bars 76, 77, 7 3 in which the stitching needle 79 and hooked needles 80, 81 are respectively mounted. The 'rotary motion of shaft 2 causes 'these needle hars vmeans of an antiliriction roller 108 carried bytheend 107 of the lever. The lever 100 transmits its motion through a pin 105 to the link 104, and thence through the pin 106 to the rod 101.

110 is a lever. ulcrumed at 109 on the framing for actuating the har 111 (carrying the hooked needle 112) by means oil? the clamping sleeve 113 and link 114 (Fig, 2). rlhe antifriction roller 117 mounted on the lower end ot lever 110, bears against the cam 119 on the shalt' 2. To the har 13 there is lined a earn 120 (Figs. 2 and 5) iter actuating the loop catcher 122 which is mounted on the pin 121 mounted in the framing. The shaft 123-rnounted in the framing has an arin 124 carrying an antifriction roller 126 which bears against the periphery ol' the earn 127 (Fig. 3) mounted on Shaft 2. The shaft 123 has also a forked lever 128 which engages the underside ol the shears 16a on the shaft 16 kand causes the said shears to open and close Figs. 3, 5 and 9 to 16, the knotting action takes place in the upper part ofthe chainber enclosed by the plates 63 and V64, and directly below the top of the angle` rEhe shears are shown in Fig. 3 in their lowerinos't position and during action they are raised to the position shown in Figures 16 and 46. rlhe blades of the shears 16a are arranged to one side of the shaft 16. Therefore, when the shalt turns on its axis, the blades describe an arc around the axis ot the shaft 16. When the shaft 16 turns while in its raised position, the peint of one .ot the open A.blades engages the stop 132 and the shears are thus closed (see Figures 46 and 47). 134 is a le ver on a shaft 133 mounted in the framing,

its lower arm carries an antitriction roller 136 which slides along the cam v137 (Figs. 2 and 3). @n the same shaft is a lever 138 with a tongs 139 adapted to be operated `by a cam 137- (Figs. 3, 30-32). rlhe tongs 139 have two jaws 160, 161 ot which one is pulled towards the other by a spring 143.

'llhe lever 144 fixed on the shaft 141 mounted in the framing, slides with the antifriction roller 146 against the cam 147 and causes the lever 140 fixed onthe'saine shaft, to press against the nose 142 situated on the tongs so as to open these tongs (Figs. 5, 30-32). On this nose being released the tension spring 143 closes the tongs again. This opening and closing ot the tongs by means of the pin 140 takes place only in the. uppermost position et the tongs, when the tongactuating nose 142 is situated quite close to the lever 140 (Figs. 2, 3, 5).

The operation of the improved machine is as follows lt lis assumed that the parts of the machine are in the positions shown in Figs. 1 to 5.

The reel 148 containing the supply of thread is mounted on a pin 149 (Fig. 4) on the framing. The thread passes thence through brake block 150 (not further hereindescribed), the thread clips 151, 152, the bore of a thread-tensioning device 153 (acted upon `hy the pull of a spring) and between the brake blocks 154 to the needle 79. rllhe thread is held tightly hy the brake blocks 154. The sheet `eto be stitched is laid with the told upon the ridge of the two table plates 63 and 64.

lVhen the operator desires to start the machine, he presses the treadle 5 down with his toet. 'thereby releasing the clutch pin 155 which has been held bach hitherto. and which is thus caused by a siiring to engage teeth provided `on the huh ot driving` pulleyv loose on shaft and thereby the latter in motion. The lever which is under the indu nce of the cani 52, new moves the stitch plate 46 downto he stitched'. By the vaction oit the earns nea-0,369

82, 83, the needles T9 and 80 are lirst driven through the sheet to he stitched and through the holes in the stitching` plate (Figs. 'l0 and ll); the arrangement being` such that the stitching needle S0 is caused by a spiral groove 1TB in the spindle Tl' andl dried stud l'i' engaged in said groove, to malte a quarter oli a revolution, so that when the needle is in its highest position its hook is directed 'towards the rear.

The action of the cani 82 is such that when the stitching needle 'T9 with its thread, has reached its highest position, it will more back again for a slight distance with the result that a loop is termed in the thread above the sheet to be stitched l0). rllhe cam 19 now pushes the vupper thread `looper 29 in F l0 to the right, so that the thread is caught and drawn out by the said looper.

ln the underside of the stitching plate there is provided a longitudinal slot groove 46 tor receiving the upper stitching thread (Fig. 25). During the passage of the needles through the material this groove is covered at the location ot each needle by the tongues 58, 59, (each formed with a slot) respectively, in order that the needles shall not loe able to drag the paper in with them in entering the stitching plate (Figs. 1,2 and 25).

llllhen the loop has been caught by the upper thread looper 29, the stitching needle 7S) moves back into its lowest position, whilst the length oit thread connarised between the sheet to be stitched and the needle 7S) assumes a stretched vertical position. 'il-he am t3 now causes the lowerl thread looper lfito move to the right until its longest prong extends slightly beyond the thread. lhe looper .la is then caused by the action olf the cam bar 68 and lever 65 to more towards the rear (Figs. ll and l2), whereby the thread is drawn out into the torni of loop 15'? and placed into the two thread rests 158 and 159 of the thread looper 14.-.' The upper thread looper 29 meanwhile holds the thread in such a manner that the end 160 of the thread lies against the bach of the hooked needle 80. ln the position oi the .lever 33 shown in Fig. il, the end 160 oil' the thread ies upon the thread looper 29 and is held at that point. llhe hoolred needle 8l) is then moved downwards by the cani 8&3, so as to draw the thread out into the torni of a loop lil (F ig'. the said needle turning; baclr; `again ugh the aforesaid quarter or" a revolution. These movements or' the needle SO give to the loop lol a position such that e thread looper l. in `incitingforward, oasses through this loop, and as a result the loop l5? is drawn through the loop lol.

During this procedure the loop ca'cher i252 caused by the cam bar 120 to more the bar 68 shown in L rests on the elevation the looper is in the rearward position, and when the roller lies i; ie

on the lower surface at the right ot` ridge, the looper is in the forward position. luring the pas. oit the thrmfl looper le through the loop ll, the looper is caused by the cani bar to move forwardly, and thereby open out the loop ll. still more, in order that the thread loope lll shall slip through with complete certainty. Before this looper has drawn out the loop 157 completely, it is caused the cam bar 68 to make again a rearward rnovenient.v whereby it cornes close to 'the horizontallysituated hooked needle jllQ. ln this position the closed shears 16a passes up from below between the di'aiffnsout loop lili and the thread looper ist, whereupon the shears by rotating); around sha'l't i6 (F i9) draw out the two sides ot the loop 157 into the form ot a horizontal loop 157 and pushes it into a slot 162 oli the loop catcher 122 19, 20, 35).

ll/leanwhilethe sides oi the thread loop lo? are lrept apart roin each other by the two thread rests l5 and 159 oif' the thread loopor lll. The hooked needle lill is now pushed horizontally through the loop (held apart by the thread loofgper) into the opening 222 oil the .loop catcher F' 5. 2l), 3:3) in which position the two sides ot the loop 157 which are forced together at this point of the loop catcher, slip upwardly over the inclined sui-tace oi the hooked needle 112 (Fins. 3io-38).

As the hooked needle l' 2 now mores bach. it catches the two last mentioned sides of the loop 1573 and draws them between the other two sides oi the loop l5? (Figs. l/l, 2l, 39) and out through the saine, whereupon the loop lol is released. trom the hooked needle 80 by an upward movement, and the shears loa malte a rearward rotation so as to brine the double loop situated upon it in a straight line with the needles (Figs. 22 and 'l`he tri Igor l0?. now moves up wards, thereby engaging' the rear sides ci the last inentioned` double loop between the shears lo* and the hooked needle 112. messingr if. aoainst the sheet to loe stitched. .et the time the third hooked needle Fil passes with its hook rearwardl;v through the :il nuhh` loop d pierces the sheet to he stitched. thereby enge-.J` the end lo@ the thread carried by the threat. looper 25).

*it the saine time the loop been l. l l) ing plate 61, the lever 58 acting to rotate carried hitherto by the hooked needle 112 and the shears 16a, is released by the downward movement oit' the rod 16, whereupon 'the loop being drawn tight by the tension oit the thread, fits closely around the knetter and hooked needle 8.1 (Figs. 15 and 2l). The loop 161 (Figs. 12) is released at the same.

time as the loop 157 (Fig. 1l), whereiunon` the released thread is drawn out by the thread looper 29 over the sheet to be stitched, is engaged by the hooked needle 8l. and drawn down by the y.knetter and the thread looped around it, and drawn through the tongs 139 which have been opened by the pin 140 striking against the nose (Figs. 16, 30, 31 and 32).

As soon as the end 160 of the thread has entered the tongs, the latter closes and rnoves forwards, 'the trigger moving down and releasing the loop for the purpose oi tightening the knot by the tongs and drawing` the thread tight (F ig. 1G).

ln orde'i` to release the loop the shears 16 have made a downward movement, and t en they rotate slightly on their own axis 16 in such a manner that the shears lever 129 in its next ascent strikes the pin 130 (Figs. 3, 2G), opens the shears and then in its opened moves down a short distance. The shears remains in this position until the ln'iotting operation has been completed; it then nieves up; the thread 165 1G) to be severed, vlying between the two open shears blades; whereupon the shears rotate on their anis.

rlhe opened shears blade hereby strikes the stop 182 (Fig. 3) and closes again so ceinpletely as to sever the thread, whereupon the shears moves down again into its lowest position.

Whilst alter the looping` operation the thread looper 14; returns into its Ainitial position, the loop catcher 122 moves again los wardly, but then immediately Inoves bach again, and the point 166 oit the loop catcher (Figs. 16 and 3) engages and holds the thread 165 which is to be cut ofi. hs soon as the upper thread looper has completed its stroke towards the right, the nose 31 by striking the lever 53 `causes the tongues 58, 59, to uncover the slot 4to in the stitchthe shaft 4r-5 that moves the said tongues. ln the return movement oi? the thread looper shalt 27, the inclined surface 168 oil the nose strikes the lever 5e, thereby pushingthe tongues' in again, so that the needles will be able in the next working stroke to pierce the sheet to be stitched.

In cases where a label is to be st"ehed instead of a sheet, and the thread has to be drawn through the aperture in the label and to be knotted, the stitchingneedle 79 is inserted in the bar 77 and lthe thread 'l5-i is threaded through the said needle (llig. l0). The needle 81 will now pass through the Macnee;

aperture in the label, and the operation is as follows The label 170 is placed upon the saddle ot. the table that its apperture cornes over the needle 81; it is held in this position by the descent ol the stitching plate 46. rlhe stitching needle 79 now moves upwards, but when the needle 79 has reached its highest position, it will nieve bach again for a slieht distance with the result that a loop is il'orrned which ,il-oop is caught by the upper thread looper 29, (F l1). The stitching needle 7 9 .new moves down' to the fullest ere tent', whereupon the thread is caught by the lower thread looper 14: and drawnv out into the forni ol a loop the sides ot which rest in the rests 158 and`159 of the thread looper le (Figs. l1 Zl2). drawn out loop is effected as lollowszf'lhe shears 16a .pass from below between the thread looper 1l and the `loop 157 (Fig. 43), and then by a rotational movement around the shalt 16, pull the said loop out transversely, whereupon the horizontal hooked needle 112 enters the loop, engages the sides el the loop 'that pressed together by the loop catcher 122, and draws themy out in the return movement oli' the hookedneed'le (Fig. el). Thenthe thread looper le is moved completely bach so as to release the loop which new lies quite closely around the shears 1G (Fig. le). Thereupon the trigger 102 ialres an upward movement., grips the rear sides of the double loop between the shears 1G and the hooked needle 112, and pnssestheni against the label 17 O. At the saine time the second hooked needle 81 pi'ishes its rearwardly directed hook through the double loop and the aperture in the label, and engages the end 160 of the thread earried. b v the thread looper 29; whilst the loop that has been carried hitherto by the hooked needle 112 and the shears` 16a, is `',released, whereupon this loop is drawn taut by the tension on the thread, so .that .it lits closely around the knetter' and the hooked needle (Fig. 45). The end 160 et the thread which during` this operation has been drawnout by the thread looper 29 and engaged by the hooked needle 81 is now bythe descent ol the needle 81 dra-wn down beside the trigger and rthrough its loop a-nd through the now opened tongs 139 (Figs. 3 and 17). rlhe openingv of the latter is effected hy the tappet stud 140 pressing against the nose 142.

es soon as the end 160 ol the thread has entered the tongs, the latter are closed by the tapped stud 140 leaving the nose 14.2 oil? the tongs, and it then nialres a. forward inovernent. llt the saine dine the trigger inoves down and releases the loop to allow the lrnet to be drawn tight by the tongs and the drawing out of the thread (Fig. 18). Meanwhile a hoolz 170 (Fig. 17) screwed rlhe lrnotting o the llO las eng: ged #he hieed le. mill drawn it u` alter t ze ,ch loop loi) (nhg. been released by the middle he shears lo i o gripper and severing the thffied the, sain" movel. ln e. stiching machine for r-,fticliingg slieetS together with 'hreiifh Jche cofinbination of a. stitching plate, three needles, an upper thread looper above the stitching.; plate, a lower thread looper belen' the stitching plete, rotary sheare edepied to turn around vertical s, end lo move in the direction of Lha'i` exis, e horinonrnll movable hooked needle, a tri r for pix-ese4 ing Athe loop egainet Jdie sheet ro be l i, and teneis ifor ,D pping end holdin die end or" "che thread.

9,. ln e Stitching iine lli o conibii'iu- 'tion of a sitchlnp; nube, an upper thread looper above 4@he Mil-Ching ifilabe, a Shelli mounted in bearings end menne foi seid shaft to end iro, a. loivfir -hri below the stieliing plete and li. l ot i' shaft, a cani bur, an erm on ehe shell hav ing; an aneifric'cion roller and beimg` f egainslthe cem oar by :i spi-ln Cor the loiver thread looper rearva,rdlA Wardljy, he lov-ver `hread looper he f i grooves separated from erich other ,o v e pointed member for Jrhe purpeee of receiving the tivo sides of the loop.

3. ln e Siitching machine, the combinetion of an upper thread looper, ineens 'for moving the upper three-d looper io end ifro, a sbitcliing plate, ,grooves in the underside of the stitching plete, a lever mounted ro* tatably in the framing' end carrying` bhe stitching plate, Jlongues engaging in seid grooves and preventing- Jshe dregging olf the sheet. `when Ythe needle eniers or rerurns, e bar eonnecing the tongues, a.. she-fi mouned on said lever, levers fixed on the?J and carrying the bar, and Ineens :for turning the shrill, when the upper blu-end looper hee reached ille end of his course.

e. ln a Stitching machine, the combinetion of a driving sliaf, o, eem mounted thereon, a lever aerueted by the eem, a bei' mounted vertically and carrying shear blades, ineeneI acuaed by said. lever for, turning said bar, second Cain, means actuated by the second cam for lil-ting and loiverin@- said bar, en erm d on one of the she r blades, a frame and stops lined on the rzune and engaging seid erin for openinhY and closing; Jehe sheer blades .vlien the bar is moved vertically and Jurned.

ln sllitohingg machine, the combination of a shaft, a lower thread looper fined on 'the sballo', e bar lifted on seid shaft, a framing, a loop catcher rotatably mounted on `the framing' and resting with one end on said eam ber, :i ber, e hooked needle fined on Said bar, means 'for movimgr the bar lenghiviee, Said loop catcher havingen opening, and the cem shell; holding` the loop co'cher in position permitting the peso'l the hooked needle Jshrough said opening` for catchingj the loop held b v the leiver fhreed looper.

ln a. gliirching machine, the Combine* tion of e soiiaeliingj ple-te, a she 3, a lower *breed looper ed on seid shale, a rod, a -V`gger mounted on Seid rod, and ineens for rising and lowering; the rod with the trigglglie rear ,Cidre or the loep `inet per end pressing released b v he lorver thread looper infra the sheet 'to be sitched.

7. T n :i stitching machine, the combinatonge for the end of ihe framing, e lever roeteblv mounted n the framing, cem for moving); seid lever, Jhe tongs being` disposed on Jche lever and having Jmvo jaws, a nose on one of the jews, :i lever pressing; with one end on Said nose for opening Jehe tongs, and a cem for aetuaing one end of the last nentionef lever.

,ln tesimorlv whereof l have affixed my signature in ihe presence of a Witness.

TULlllCH BSCHOF.

Vitness HERMANN HUBER. 

